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No. 625,782. Pafented May 30,1899.

.1. c. MILLER. DRIP THOUGH FOR CENTRAL DRAFT LAMPS.

(Application filed June 27, 1898.)

(No Model.)

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NlTED STATES PATENT ()FFIGE.

JOHN C. MILLER, OF TORRINGTON, CONNECTICUT, ASSICNOR TO THE MILLERMANUFACTURING COMPANY, OF SAME PLACE.

DRIP-THOUGH FOR CENTRAL-DRAFT LAMPS.

SPECIFICATION forming part of Letters Patent NO. 625,782, dated May30,1899. Application filed June 27, 1898. Serial No. 6 84,554. (Nomodel.)

To all whom it may concern:

Beit known that I, JOHN C. MILLER, of Torrington, in the county ofLitchfield and State of Con necticut, have invented a new Improvement inDrip-Troughs for Central-Draft Lamps; and I do hereby declare thefollowing, when taken in connection with the accompanying drawings andthe letters of reference marked thereon, to be a full, clear, and exactdescription of the same, and which said drawings constitute part of thisspecification, and represent, in-

Figure 1, a broken view of such a draft-tube blank as may be used inproducing my improved driptrough; Fig. 2, a view thereof after the samehas been struck up so as to pro duce a drip-trough; Fig. 3, acorresponding View after the closed top of the tube has been cutaway forthe reception of the air distributer or cone; Fig. 4., a plan view ofthe top of the completed tube; Fig. 5, a broken View, in verticalsection, showing the tube with an air (listributer or cone supportedupon the upper edge of the inner wall of its drip-trough.

My invention relates to an improvement in drip-troughs for central-draftlamps, the object being to provide at a very low cost simple andeffective means for preventing such lamps from weeping, which is theterm employed to describe the escape of oil into the interior of thecentraldraft-tube, from which it dropsdown upon the table-cloth or intoa drip-cup, if the foot of the lamp is provided with one.

With these ends in View myinventioncon- I sists in a draft-tube havingan integral annular drip-trough formed within and coincident with itsupper edge.

My invention further consistsin a draft-- tube having an integralannular drip-trough formed within and coincident with its upper edge,incombination with an air-distributor adapted to be supported upon theinner wall of the said trough.

My invention further consists in certain details of "construction andcombinations of parts, as will be hereinafter described, and pointedontin the claims.

In carrying out my invention as herein shown the central draft-tube isformed from diameter of the finished tube and having its upper endclosed. The closed upper end of such a blank is subjected to the actionof dies or other instrumentalities, by which an integral annular driptrough B, having an outer wall I) and an innerwall b, is formed withinand coincident with the extreme upper edge of the tube, as shown in Fig.2. As shown, this drip-trough is V-shaped in crossseotional form; butthough that form is the form I prefer I do not limit myself to it. Thecentral portion of the closed top of the blank is then cut away to formthe circular opening C, which permits the air distributer or cone to beset down into the upper end of the tube. The said opening, it will benoted, corresponds in diameter to the inner diameter of the drip-trough,the metal being cut away on a line intersecting the edge of the innerwall thereof. The air distributor or cone may be of any approvedconstruction. As herein shown, it comprises an imperforate or solid capD and a perforated thimble D, which is reduced in diameter below itscenter to form an annular shoulder D which provides for supporting thedistributer or cone upon the upper edge of the inner wall of thedrip-trough B, as clearly shown in Fig. 5 In this way the drip-trough ismade to perform the twofold function of collecting escaping oil and ofsupporting the air distributer or cone. It will be readily understoodthat any oil which works its Way into the trough will,

when the same is full, run over the outer wall wall of the trough intothe interior of the draft-tube A by the heat communicated to the saidwall by the flame and air-distributer, the oil being thus driven outwardtoward the outer wall of the trough or vaporized and burned.

Myimproved drip-trough is not only highly effective, but extremelysimple-and capable of being produced atalow cost. No solderis requiredfor its production nor any nice fit ting of parts.

It is apparent that in carrying out my in vention some changes from theconstruction IOO herein described and shown may be made,- and I wouldtherefore have it understood that I do not limit myself to the exactconstruction shown and described,but hold myself at liberty to make suchchanges as fairly fall Within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A central draft-tube having its upper end formed with an integralannular driptrough located within and coincident with its extreme upperend and havingan inner and an outer wall.

2. A central draft-tube having" its upper end formed with an integralannular driptrough having an inner and an outer Wall, located within andcoincident with its extreme upper edge, and V-shaped in cross-sectionalform.

3. A draft-tube for central-draft lamps, having an integral annular driptrough formed Within and coincident with its extreme upper end andhaving an inner and an outer .Wall, in combination with an airdistributer Witnesses:

1\/IAJOR WARNER JUDGE, WILLARD A. RORABACK.

